I have Saiga 12. I purchased mine when CDNN was selling them for $269. Mine has the adjustable sights. I wish I picked up two or three more of these guns as mine is as durable and reliable as any other AK. Recoil is no big deal with this gun; but I haven't tried slugs or 00 buck through the gun yet, so I can't comment on recoil with those loads.
If there's anything negative about the Saiga 12, is that they are not currently supported, like our beloved Steyrs, nor imported into the U.S. (yet) making parts and magazine availablity scare....especially with mags more than three rounds in capacity (there are five and eight round mags) aren't cheap; they can run you over $100 on Gunbroker or even eBay.
Go to the Saiga 12 forum to see great pictures of some Saigas modified with folding stocks, Russian furniture, AK sights, muzzle breaks, etc., to make them look like AKM's/AK-74's on steriods. Good stuff!